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NITED STATES ATENT OFFICE.

PAUL J. SOHLICHT, OF SUMMIT, NEYV JERSEY, ASSIGNOR TO EDMUND FRANCISELDREDGE, OF NEW YORK, N. Y.

APPARATUS FOR PRODUCING COMBUSTION.

SPECIFICATION forming, part of Letters Patent No. 556,283, dated March10, 1896.

Application filed a ua y 14,1896. Serial No. 575,487. (No model.)

To all whom it may concern:

Be it known that I, PAUL J. SOHLIOHT, a citizen of the United States,residing at Summit, in the county of Union and State of New Jersey, haveinvented a new and useful Improvement in Apparatus for ProducingCombustion, of which the following is a full, clear, and exactspecification, reference being had to the accompanying drawings, whichform a part hereof.

My invention relates to means for carrying out the improved method ofproducing combustion described in my earlier application, Serial No.523,782, and its object is to provide an efficient, convenient, andeconomical apparatus for introducing the air or other supporter ofcombustion into the chimney or stack and directing it toward the placeof combustion, so as to cause it to fiow thereto in contact with the hotproducts of combustion escaping therefrom.

My invention consists in the combination, with a chimney or stack orother flue through which the products of combustion escape, of anair-inlet pipe extending into the chimney or stack, through which pipethe air is introduced into the chimney or stack and by which the air isdirected and caused to flow toward the place of combustion in contactwith the hot products of combustion. I

My invention also consists in so construct in g or arranging theair-inlet pipe that it will be in contact with the wall of the chimneyor stack for a substantial distance, whereby the air passing throughsaid pipe will be heated by the heat imparted from said wall.

My invention also consists in the combination, vn'th such a chimney orstack or flue, of an air-inlet pipe extending over the top edge of thesame and down on the inside and on the outside thereof, whereby the airfirst ascends the outer leg or portion of the pipe and then descends theinner leg or portion thereof, being steadily raised in temperatureduring its passage through said pipe, and then flows to the place ofcombustion in contact with the hot products of combustion escapingtherefrom.

My invention also consists in certain other features of construction andcombinations of parts hereinafter described and claimed.

My invention is fully shown in the accompanying drawings, in which-Figure 1 is a perspective view, partly in section, of a stack havingseveral forms of air-inlet pipes applied thereto. Fig. 2 is a top orplan view of the same, and Fig. 3 is a perspective View of the preferredform of my improvement.

Similar letters indicate siinilar parts in the different figures/- a isthe upper part of an ordinary metal stack. 1) is an air-inlet pipeconstructed according to my preferred form. It consists of a bent pipewhich is adapted to be hung upon the top of the stack, as shown in Figs.1 and 3. If necessary, it can be fastened in position, any suitablemeans being employed for this purpose. The pipe has an outer leg and aninner leg adapted to rest against the wall of the stack. These legs canbe made of any desired length. The air rises through the outer leg anddescends through the inner leg and then flows to the place of combustionin contact with the hot products of combustion. The size of the pipe canbe varied according to circumstances.

c c c are three air-inlet pipes of similar construction. They are formedat the top with horizontally-disposed ends adapted to catch the air.These pipes, as shown, extend a considerable distance within the stack,so that the air before escaping therefrom is heated to a greater or lessextent indirectly by the rising products of combustion. The air entersthe horizontally-disposed ends and passes down through the pipes andthen flows to the place of combustion in contact with the hot productsof combustion escaping therefrom. The size of these pipes can be variedaccording to circumstances.

d is an air-inlet pipe applied to the outside of the stack. It is madeto enter or open into the latter at any desired point. Its upper end isalso horizontally disposed. In this position the pipe is heated byconduction from the stack, and in return heats the air which passesthrough it. Vhen the pipe enters or opens into the stack, a deflector eis used to give direction to the entering current of air. This deflectoris in effect a continuation of the air-inlet pipe.

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In the drawings, f f are arrows indicating the direction of theair-currents.

g g are arrows indicating the direction of the current of combustionproducts.

It is best to employ a number of such airinlet pipes with a stack orchimney and to arrange them at different points, so as to supply air toevery part of the combustion-chamber and secure the most extended andcomplete contact between the air and the combustion products. I preferto distribute a number of such pipes at regular intervals around thewall or sides of the stack or chimney. Any suitable means may beemployed for supporting the pipes in their proper positions.

Anysuitable supporter of combustion may be used instead of air.

My improved apparatus is simple in construction and can be easily andeconomically made and applied. By using two or more pipes of suitablesize the particular needs of each case can be readily supplied. Theapparatus can thus be adjusted to fit any special conditions orrequirements.

ney or stack, and being in contact for a substantial distance with thewall of the chimney or stack and adapted to introduce a current of airand direct it toward the place of combust-ion substantially as setforth.

The combination with a chimney or stack of an ail-inlet pipe extendinginto the chimney or stack and over the edge of the same and adapted tointroduce a current of air and direct it toward the place of combustion,substantially as set forth.

I. The combination with a chimney or stack of an air-inlet pipe passingover the top edge of the same and extending down on the inside and onthe outside thereof, substantially as set forth.

5. The combination with a chimney 0r stack of an air-inlet pipe passingover the top edge of the same and extending down on the inside and onthe outside thereof in contact with the wall of the chimney or stack,substantially as set forth.

6. The combination with a chimney or stack of two or more air-inletpipes extending into the chimney or stack at different points andadapted to introduce currents of air and direct them toward the place ofcombustion substantially as set forth.

7. The combination with a chimney or stack of the air-inlet pipe I),substantially as set forth.

PAUL J. SCIILICIIT.

\Vitnesses E. FRANCIS ELDREDGE, EDWIN SEGER.

